Commit a9e96b88 authored Jan 21, 2019 by Phil Elwell

overlays: mcp23017: Support the MCP23008

Add an 'mcp23008' parameter to enable support for the MCP23008 device.

See: https://github.com/raspberrypi/linux/issues/2818



Signed-off-by: Phil Elwell <phil@raspberrypi.org>

parent 01269567

arch/arm/boot/dts/overlays/README

+2 −0

Original line number	Diff line number	Diff line
		@@ -1202,6 +1202,8 @@ Params: gpiopin Gpio pin connected to the INTA output of the

		addr I2C address of the MCP23017 (default: 0x20)

		mcp23008 Configure an MCP23008 instead.


		Name: mcp23s17
		Info: Configures the MCP23S08/17 SPI GPIO expanders.

arch/arm/boot/dts/overlays/mcp23017-overlay.dts

+9 −1

Original line number	Diff line number	Diff line
		@@ -45,10 +45,18 @@
		};
		};

		fragment@3 {
		target = <&mcp23017>;
		__dormant__ {
		compatible = "microchip,mcp23008";
		};
		};

		__overrides__ {
		gpiopin = <&mcp23017_pins>,"brcm,pins:0",
		<&mcp23017>,"interrupts:0";
		addr = <&mcp23017>,"reg:0";
		mcp23008 = <0>,"=3";
		};
		};